Forming Comparative and Superlative Adverbs:
To form the other degrees of adverbs, follow similar rules to the respective adjectives.
STEM + ior, ius = comparative adjectiveSTEM + ius = comparative adverbExample: lentius, brevius, clarius
STEM + issimus = superlative adjectiveSTEM + issimus; change the final –us to an –ē = superlative adverbExample: letissimē, brevissimē, clarissimē
**the same rules for adj w/ stem ending in ‘l’ or ‘r’ are the same for adv Examples: Facillimē, celerrimē